Hack the Hydra

Unix timestamp converter

Type a Unix timestamp such as 1700000000 and see the date in ISO 8601, UTC and your local time zone. Or type a date such as 2026-11-06 12:00 to get its epoch value. Leave the box empty for the current time.

🔒 Private by design: the conversion runs in this browser tab. Nothing is uploaded.

Unix timestamp converter is a free online tool by Hack the Hydra. Convert a Unix timestamp (seconds or milliseconds) to a readable date, or a date to epoch time. Shows ISO 8601, UTC and local time. Free, in your browser.

100% freeNo upload: runs in your browserNo sign-up
Unix timestamp converter: the tool with a sample file converted

What a Unix timestamp is

It counts the seconds since 1 January 1970 00:00:00 UTC, ignoring leap seconds. Because it is one number with no time zone, databases, logs and APIs use it to store moments in time unambiguously.

Seconds or milliseconds

A 10-digit value like 1700000000 is in seconds, the Unix and Python convention. A 13-digit value like 1700000000000 is in milliseconds, used by the JavaScript Date.now() call and by Java. The tool picks the unit from the size of the number and shows both results.

Typing a date

ISO formats such as 2026-11-06, 2026-11-06T12:00:00Z and 2026-11-06 12:00:00 work. A date without a time zone is read in your own time zone; add Z at the end for UTC.

Example

A 10-digit Unix timestamp (seconds) converted to readable dates. The tool also shows the time in your own time zone.

Input

1700000000

Output

ISO 8601 (UTC): 2023-11-14T22:13:20.000Z
Unix seconds: 1700000000
Unix milliseconds: 1700000000000
RFC 2822: Tue, 14 Nov 2023 22:13:20 GMT

How to use

  1. Type or paste your text in the box above.
  2. The result updates as you type; change the options to switch mode.
  3. Copy the result or download it.

FAQ

What is the Unix epoch?

1 January 1970 00:00:00 UTC, the zero point of Unix time.

What happens in 2038?

Systems storing seconds in a signed 32-bit integer overflow on 19 January 2038. This tool uses JavaScript numbers and is not affected.

Does it send my input anywhere?

No. Conversion is done by your browser.

Can it handle dates before 1970?

Yes, negative timestamps are valid and give dates before 1970.

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